Section 4 Understand the local human-machine
interface
About this chapter
This chapter describes the display, its keys (buttons) and LEDs that make up the HMI.
How the keys are used to navigate the HMI, how to interpret the graphic information
on the LCD and, what the LEDs indicate is explained in the sections that follow.
4.1
Overview
The human machine interface is used to monitor and to some extent control the way
the IED operates. The configuration designer can add functions that alert to events
requiring the attention of the operator.
ANSI05000525-2 V1 EN
Figure 1: 1/1 x 19” case with medium LCD
4.2 Keypad
The keypad is used to monitor and operate the IED. The keypad has the same look and
feel in all IEDs. LCD screens and other details may differ but the way the keys
function is identical.
1MRK506276-UUS B Section 4
Understand the local human-machine interface
19
Operator's manual
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